package 线程安全;

public class Test {
    private static int count=0;
    public static void main(String[] args) throws InterruptedException {
        Object locker=new Object();
        Thread t1=new Thread(()->{

            for (int i = 0; i < 50000; i++) {
                synchronized (locker){
                    count++;
                }

            }
        });
        Thread t2=new Thread(()->{

            for (int i = 0; i < 50000; i++) {
                synchronized (locker){
                    count++;
                }

            }
        });
        t1.start();
        t2.start();
        t1.join();
        t2.join();

        System.out.println("count="+count);
    }
}





















